Board of Governors of the Federal Reserve System (U.S.), 1935-. "Trade Credit, Seasonally Adjusted Annual Rates," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "February 10, 1978," Z.1 Financial Accounts of the United States (1978-02-10) : 52-52. https://fraser.stlouisfed.org/title/93/item/69133/toc/478419 , accessed on March 29, 2024.